If everything went well you should now find that you get:1: 0.0000002: 0.0000003: 0.0000004: 0.0000005: 0.0000006: 0.0000007: 0.0000008: 0.000000
printed repeatedly to the screen.
You can test that the ADC is working by using e.g. a bent paperclip to connect the "5V" on the board to one of the eight ADC channels, and the corresponding reading on screen should then read approximately 5V (in fact, the voltage output by your PSU).